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Oh thank you all for your answer to me.. the rf power meter was need i know.. but i have a wish to make this real with a arduino and this bridge for swr and power meter.. on youtube i have seen.. but

Thank you Gordon for the critique of the social skills and for the compliment on technical skills. I want to ask you to carefully review what you see as my raining on the parade of the uBitx. I have

6.154 is a 6M PA to about the 300mW level using 2n5109s. The Fedback and bias is 2.2k, base to ground is 470 and the emitter degeneration is 3.6ohms. I have a radio using that exact circuit and it

Warren, we already know that you would like to rain on this parade at every possible chance. You will do a whole lot more good if you simply acknowledge that we already KNOW that and that you think

Thanks Raj. I will pursue any tests you request but I have given up on this version of uBitx. I only ordered the filter to try because of the miraculous results reported. But I am really not

Thanks! You should check at 7.4/14.2 21.2 and so on.. To observe the behavior of spurs. 1: Lock PTT 2. Press Fn button on tune knob 3. Select band select Now you can tune TX while in TX in steps of

Raj As requested. I have included a peak table to help in identifying the spurs. 970.jpg conditions: Yellow trace: 1 KHz audio drive = 15 mVRMS, RV1 set to 2 watts out, R27 attenuator set to -1 dB.

Am 06.09.2018 um 22:51 schrieb W2CTX: .... /** * File name ubitx_V2_00R.ino * This source file is under General Public License version 3. * 73, Matthias DD7NT

Thanks OM Sharmaji on your valuable advice. Will follow those. Thanks and regards ARNAB SEN ( VU2CMV ) 6/35 JM SENGUPTA ROAD. B-ZONE. DURGAPUR-713205. MOB:9434833047

Warren, Reduce your RBW to 10KHz and VBW to 1KHz and let me see a screen. With 300K many spurs will get combined. Raj

Arnab jee, Yourself have rightly pointed to this link.http://ubitx.net/tag/tda2822/ In my opinion there is no need to swap to LM386. The regulator mod could well be seen. Another issue troubling

Just for fun and to try some different output transformers on the PA chain, I built (dead bug) the Q90 and associated components test circuit ..Some will recognize it as part of Fig. 6.154 from EMRFD

The problem was the original "relimate" two wire output cable that I had twisted and then connected to a BNC.. now the power is better! Raj

Dear OM Sharmaji, Thanks for your reply and help. In uBitx.net website , using a 9v regulator to supply to 2822 has appeared. Thinking to do that. Also can divert the audio to a LM386 or PAM module.

Arnab jee,?i understand your issue.Last time some one manipulated the TDA2822 adopting 7806 regulator.?Perhaps in files ot photos section you find the details of back plane as I saw the regulator

I have been having fun with the ubitx v4 using CEC's firmware and nextion display. My problem is I cannot get the bandscan or spectrum screens to work with the i2c standalone dspmeter addon. I have

I watch who buy from, and see that one will while the next will not. I have seen absurd shipping charges, an sellers like that i skip past. part of the problem is that my paypal is tied to my PO box

Except, even at a fast nerve impulse speed of around 100 m/s the cat would meow in LA about 11 hours later. The uBITX does much better than this. Tom, wb6b

Some merchants only ship UPS or FedEx and will NOT ship USPS flat rate. Why? If they are a large merchant and have a national business contract with either UPS or FEDEX they get a large discount, up

Thanks for the helpful information!